Derivatives (Details 3) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Foreign currency option contracts | Derivatives not designated as hedging instruments
Derivative Instruments, Gain (Loss) [Line Items]
Net (loss) gain recognized in earnings	$ 0.0	$ 0.0	$ 0.0	$ 0.0
Foreign currency option contracts | Cash Flow Hedge
Derivative Instruments, Gain (Loss) [Line Items]
Net (loss) gain recognized in Other Comprehensive (Loss) Income, net of tax	(0.3)	(0.1)	0.0	(0.2)
Net gain reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Interest Income	0.0	0.0	0.0	0.0
Net gain (loss) reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Net Foreign Currency Transaction Losses	0.0	0.0	0.0	0.0
Foreign currency forward exchange contracts | Derivatives not designated as hedging instruments
Derivative Instruments, Gain (Loss) [Line Items]
Net (loss) gain recognized in earnings	(1.6)	(0.6)	0.6	(0.8)
Foreign currency forward exchange contracts | Cash Flow Hedge
Derivative Instruments, Gain (Loss) [Line Items]
Net (loss) gain recognized in Other Comprehensive (Loss) Income, net of tax	(1.8)	0.0	4.2	4.1
Net gain reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Interest Income	0.6	0.6	1.1	1.1
Net gain (loss) reclassified from Accumulated Other Comprehensive Loss into earnings, net of tax, effective portion to Net Foreign Currency Transaction Losses	$ (2.3)	$ (1.6)	$ (0.2)	$ 0.8